RockyTweaks
Information
Rocky Tweaks (formerly known as Rocky Core) adds the ability to tweak the Vanilla Anvil and Merchant (Villager) trades using CraftTweaker.
For More Information
Project Page: https://minecraft.curseforge.com/projects/rocky-tweaks
Bug Reports
Issue Tracker: https://github.com/DevOnTheRocks/RockyTweaks/issues